/* WOW Sleep Calculator - Core Stylesheet */
:root {
  --bg-color: #F8FAFC;
  --card-bg: #FFFFFF;
  --text-main: #0F172A;
  --text-muted: #475569;
  --primary-navy: #1B2A4A;
  --accent-gold: #D97706;
  --accent-gold-hover: #B45309;
  --border-color: #E2E8F0;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(27, 42, 74, 0.08);
}

[data-theme="dark"] {
  --bg-color: #0F172A;
  --card-bg: #1E293B;
  --text-main: #F8FAFC;
  --text-muted: #94A3B8;
  --primary-navy: #38BDF8;
  --accent-gold: #F59E0B;
  --accent-gold-hover: #FBBF24;
  --border-color: #334155;
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
  min-width: 320px;
}

/* Header & Nav */
.site-header {
  background-color: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 1.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: #1B2A4A;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
[data-theme="dark"] .logo {
  color: #38BDF8;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 1.25rem;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--accent-gold);
}

.theme-toggle {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
}

/* Main Container */
.container {
  max-width: 900px;
  margin: 2rem auto;
  padding: 0 1rem;
}

/* Above the fold Tool Card */
.tool-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: var(--shadow-md);
  margin-bottom: 2rem;
}

.tool-title {
  font-size: 1.75rem;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.direct-answer-box {
  background-color: rgba(217, 119, 6, 0.08);
  border-left: 4px solid var(--accent-gold);
  padding: 1rem;
  border-radius: 4px;
  margin: 1rem 0 1.5rem 0;
  font-size: 1.05rem;
  color: var(--text-main);
}

.calculator-form {
  display: grid;
  gap: 1.25rem;
  margin-top: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

label {
  font-weight: 600;
  font-size: 0.95rem;
}

select, input[type="time"] {
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background-color: var(--bg-color);
  color: var(--text-main);
  font-size: 1rem;
}

.btn-primary {
  background-color: #1B2A4A;
  color: #FFFFFF;
  border: none;
  padding: 0.85rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: background-color 0.2s;
}

.btn-primary:hover {
  background-color: #2D4373;
}

/* Results Display */
.results-container {
  margin-top: 1.5rem;
  display: none;
}

.results-container.active {
  display: block;
}

.cycle-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.cycle-card {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  text-align: center;
  background: var(--bg-color);
}

.cycle-card.recommended {
  border-color: var(--accent-gold);
  background: rgba(217, 119, 6, 0.05);
}

.time-val {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent-gold);
}

.cycle-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Content Sections */
.content-section {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  margin-bottom: 2rem;
}

.content-section h2 {
  font-size: 1.4rem;
  margin-bottom: 1rem;

}

.faq-item {
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  font-weight: 600;
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
}

/* Footer (NO cross-domain links!) */
.site-footer {
  background: var(--card-bg);
  border-top: 1px solid var(--border-color);
  padding: 2.5rem 1.5rem;
  margin-top: 3rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-container {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
}

.footer-col h4 {
  color: var(--text-main);
  margin-bottom: 0.75rem;
  font-size: 1rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 0.5rem;
}

.footer-col a {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-col a:hover {
  color: var(--accent-gold);
}

.footer-bottom {
  max-width: 1100px;
  margin: 2rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  text-align: center;
  font-size: 0.85rem;
}

/* Responsive Breakpoints */
@media (max-width: 640px) {
  .nav-container {
    flex-direction: column;
    gap: 1rem;
  }
  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }
  .tool-card {
    padding: 1.25rem;
  }
}